Audio-visual teaching device
Abstract
Abstract AN AUDIO-VISUAL TEACHING DEVICE INCLUDES A TABLE FOR RECEIVING A RECORD SHEET CARRYING ONE OR MORE PRINTED LINES OF VISUAL INFORMATION, AND AN AUDIO INFORMATION RECORDING STRIP FOR, AND CORRELATED TO, EACH OF THE PRINTED LINES OF PRINTED INFORMATION, A PICK-UP HEAD ADAPTED TO SCAN THE AUDIO INFORMATION RECORDING STRIP OR STRIPS, MEANS MOUNTING THE PICK-UP HEAD OVER THE TABLE ENABLING THE HEAD TO BE PLACED BY THE USER AT ANY SELECTED PORTION OF A PRINTED LINE AND/OR AT ANY SELECTED PRINTED LINE SO AS TO SCAN AND TO CONVERT TO SOUND ONLY THE AUDIO INFORMATION RECORDED WITH RESPECT THERETO, AND A DRIVE FOR THE PICK-UP HEAD FOR DRIVING SAME AT A CONSTANT SPEED ALONG THE RECORDING STRIP OR PORTION THEREOF CORRESPONDING TO THE PRINTED LINE OR PORTION THEREOF SELECTED.
Inventors
- 👤 Morris Bram
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |